hennig



H. HENNIG.

FUEL NOZZLEVALVE GEAR.

APPLICATIUN FI'LED OCT- 20,1915. 7 1 1 94;,8Q0. Patented Aug. 15, 1916.

3 SHEETSSHEET I.

Inventor. RHenniy, y

fiZior zz g y H. HENNIG.

FUEL .NOZZLE VALVE GEAR.

APPLICATION HLED ocT.20,1915.

1,194,840, Patented 15,1916.

3 SH SHEET 2.

Inventor.

R.//enniy R. HENNIG.

FUEL NOZZLE VALVE GEAR.

APPLICATION FILED ocr. 20. 1915.

1,194,8410. PatentedAug. 15,1916.

3 SHEETS-SHEET 3- awum Woz UNITED STATES PATENT OFFICE.

RUDOLF HENNIG, OF HAMBURG, GERMANY, ASSIGNOR TO GEBR. PAGLOW, OF KL. GRASBROOK, NEAR HAMBURG, GERMANY.

FUEL-NOZZLE VALVE-GEAR.

Specification of Letters Patent.

Application filed October 20, 1915. Serial No. 57,022.

T 0 all whom it may concern:

Be it known that I, Rononr HENNIG, a subject of the German Emperor, and resident of Hamburg, Germany, have invented new and useful Fuel-Nozzle Valve-Gears, whereof the following is a specification.

The present invention relates to a valve gear for fuel nozzles in internal combus tion-engines and is mainly intended for use where two fuel nozzles are to be controlled by a single operating rod in a two cylinder, two-cycle Diesel engine provided with cranks set at 180. The valve-gear may however also be employed in two cylinder, four cycle engines and the same may be arrangedso as to be reversible.

In the present invention instead of a crank-pin revolving with a counter-shaft or the crank shaft as is usual, an eccentrically pivoted arm is employed which rotates with the reversing shaft and carries a roller which strikes against normally fixed, but adjustable, cams, said cams also being adapt ed to be moved entirely out of the path of said roller. When striking against either of the cams, the roller and lever are moved relatively to the shaft, and this movement is transmitted, by means of a pin, normally concentric to'the shaft, to the needle valves of the engine, the pin being moved to an eccentric position and such movement transmitted to the valve lever by a suitable rod.

In the drawings one form of the invention is shown, by way of example, in its application to a two-cycle Diesel engine with two cylinders and two working cranks set at 180.

Figure 1 is a side elevation of the engine showing the improvement applied thereto diagrammatically. Fig. 2 is a section through the valve gear on the line A-B of Fig. 3. Fig. 3 shows a lateral view of the valve gear, partly in section. Fig. 4: is an enlarged vertical section through the upper part of the cylinders and shows the valves closed and the lever for operating said valves in its middle position, and Fig. 5 shows the same section with one of the valves opened.

The two needle-valves a and b of the fuelnozzles are shifted by a double-armed lever 0 the fixed fulcrum of which is at (Z. These needle-val es are provided with pins 00 and 3/ respectively, and the lever (Z has two notches 2 which are adapted to engage the pins 00 and 3 from the under side, In consequence of this construction either of the lever arms may be removed downward without operating the corresponding needlevalve (left side of Fig. 5). If, how ever, one of the lever arms is moved upward, it opens the corresponding needle valve (right sideof Fig. The rod 6, is pivotally connected to the lever 0 so that when the rod rises from its middle position it moves the lever to open the needle-valve b (Fig. 5) and when the rod descends, it moves the lever to open the needle valve a.

On the crank shaft 2' is eccentrically mounted a pin it to which is pivoted an arm f carrying a roller g, the arm also carrying a pin 7 by means of which it is pivotally connected to the rod 6. Mounted on the fixed pivots m and n are the cam-levers 0 and p which are connected to move in unison by a link 8 and have their positions controlled by an operating rod. The lever 0 is provided with the cam surfaces [to and law and the lever 29 is provided with similar cam surfaces Zr and lo. The arm f is mounted within a shell or sleeve u concentric with and mounted on the crank shaft 2', the shell serving to limit the movement of the arm 7 under centrifugal action. This shell u is provided with a port 14 through which the roller 9 projects under the influence of centrifugal action. By properly adjusting the positions of the levers 0 and p the parts'lw and Z1: may be shifted out of the path of the roller 9, whereas on a continuation of the movement of these levers the parts 701" and Z7 may be brought into the path of the roller 9. By suitably shaping the curves of the parts he, 701', la and Zr they may, in the middle position of the levers 0 and 9, all be completely out of the path of the roller 9. The pin r is normally held concentric with the shaft 71 bythe springs of the needlevalves a and b and by the roller 9 being held in projected position by centrifugal action. When the roller 9 strikes against the cam surfaces 7w or 737', it is pressed downwardly inward and the rod 6 makes a short downward movement and opens the needle a.

WVhen the roller 9 strikes against the cam surfaces lo or Z1" it is pressed upwardly in ward, and the rod 6 makes a short upward movement and opens the needle 7). As soon as the roller leaves these cam surfaces, the opened needle is closed at once by its sprlng w and the pin 1", the rod 6 and the lever a return to their normal position under the centrifugal action which moves the roller 9 outward. If the cam surfaces 701 and Zr are omitted in the above example the valve gear is only adapted for one direction of rotation and is thrown out of action by the displacement of the cam surfaces be and Zn. In a single cylinder reversible engine of the twocycle type only one lever such as would be required having a cam surface such as 731 for the reverse movement and a cam surface such as in; for the forward movement. In a single cylinder nonreversible engine of the two-cycle type the cain surfaces in? and Zr for the reverse movement would be omitted. In four-cycle engines the roller lever 7" would be secured to a counter shaft making only half the number of revolutions of the crank-shaft and otherwise the arrangements would be the same as above described according to the number of cylinders and whether reversible or not as will be readily understood. In lieu of the roller-lever pivoted at 71. a slide movable I in a radial direction might, of course, be employed.

lVhat I claim as my invention and desire to secure by United States Letters Patent is 1. A fuel nozzle valve gear comprising a shaft, a radially movable member mounted on the shaft to rotate therewith, a rod connected at one end to said member, means connected to the rod and operatively engaging the valves and cams movable into and out of the path of the radially movable member, said cams being arranged to move the member inward upon engagement there with, whereby to move the rod and operate the valves.

2. A fuel nozzle valve'gear comprising a shaft, an arm eccentrically pivoted to the shaft, a rod connected at one end to the arm, means connected to the rod and operatively engaging the valves, and cams movable into and out of operative position relative to said arm, said cams being arranged to move the arm inward against centrifugal action in operative position, whereby to move the rod and operate the valves.

shaft, an arm eccentrically pivoted to the shaft, a pin on the arm normally concentric shaft, a pin on the arm normally concentric to the shaft, a valve operating rod having one end connected to the pin, a pair of cam levers fulcrumed on opposite sides of the shaft and each provided with a pair of cam surfaces on opposite sides of the fulcra and selectively movable into operative relation to the arm, a link connecting said levers, and means to move the arm and bring corresponding cam surfaces on the two levers into operative position, said cam surfaces being arranged to move said pin to eccentric position when in operative position.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

RUDOLF HENNIG.

Nitnesses: GUSTAV LAMBERTZ, JULIUS AHANs.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C.

' 3. A fuel nozzle valve gear comprising a 

